Cannot run Viveza 3 and Silver Efex Pro 3

Today I installed the latest Nik Collection version (I think 4.3) on my PC (Win 8.1 64bit).

It now says, when I try to run Viveza or Silver Efex, that he cannot find the SetThreadDescription point in
C:\Program Files\DxO\Nik Collection\bin\DxOFramework.dll that allows him to carry on.

All other plugin run fine (I use that along with DxO PL 4).

Any idea?

I deinstalled and reinstalled several times, same issue.

I did tell him when deinstalling to keep the presets.

DXO support is working on this since some while. Meanwhile I downgraded back to Nik 4.3.2 - the last version that works on my old PC.